package com.hc.springboot.config;

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Properties;

import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.handler.SimpleMappingExceptionResolver;

@Configuration
public class ShiroConfig {

	@Bean
	public ShiroFilterFactoryBean shiroFilter(SecurityManager securityManager) {
		System.out.println("ShiroConfiguration.shiroFilter()");
		ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
		shiroFilterFactoryBean.setSecurityManager(securityManager);
		//拦截器
		Map<String, String> filterChainDefinitionMap = new LinkedHashMap<>();
		//配置不会被拦截的链接，顺序判断
		filterChainDefinitionMap.put("/static/**", "anon");
		//配置退出过滤器，其中的退出代码shiro已经实现
		filterChainDefinitionMap.put("/logout", "logout");
		//过滤链定义，从上向下顺序执行，一般将/**放在最下面
		//authc:所有url都必须认证通过才可以访问；anon:所有url都可以匿名访问
		filterChainDefinitionMap.put("/**", "authc");
		//如果不设置会自动访问web工程目录下的"/login.jsp"页面
		shiroFilterFactoryBean.setLoginUrl("/login");
		//登录成功后要跳转的链接
		shiroFilterFactoryBean.setSuccessUrl("/index");
		
		//未授权界面
		shiroFilterFactoryBean.setUnauthorizedUrl("/403");
		shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap);
		return shiroFilterFactoryBean;
	}
	
	/**
	 * 凭证匹配器
	 * （密码校验交给shiro的simpleAuthenticationInfo处理了）
	 * @return
	 */
	@Bean
	public HashedCredentialsMatcher hashedCredentialsMatcher() {
		HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();
		hashedCredentialsMatcher.setHashAlgorithmName("md5"); //离散算法：md5算法
		hashedCredentialsMatcher.setHashIterations(2); //离散次数，相当于md(md(""))
		return hashedCredentialsMatcher;
	}
	
	@Bean
	public MyShiroRealm myShiroRealm() {
		MyShiroRealm myShiroRealm = new MyShiroRealm();
		myShiroRealm.setCredentialsMatcher(hashedCredentialsMatcher());
		return myShiroRealm;
	}
	
	@Bean
	public SecurityManager securityManager() {
		DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
		securityManager.setRealm(myShiroRealm());
		return securityManager;
	}
	
	/**
	 * 开启shiro aop注解支持
	 * 使用代理方式，所以需要开启代码支持
	 * @param securityManager
	 * @return
	 */
	@Bean
	public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager) {
		AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor = new AuthorizationAttributeSourceAdvisor();
		authorizationAttributeSourceAdvisor.setSecurityManager(securityManager);
		return authorizationAttributeSourceAdvisor;
	}
	
	@Bean(name="simpleMappingExceptionResolver")
	public SimpleMappingExceptionResolver createSimpleMappingExceptionResolver() {
		SimpleMappingExceptionResolver r = new SimpleMappingExceptionResolver();
		Properties mappings = new Properties();
		mappings.setProperty("DatabaseException", "databaseError"); //数据库异常处理
		mappings.setProperty("UnauthorizedException", "403");
		r.setExceptionMappings(mappings); //no default
		r.setDefaultErrorView("error"); //no default
		r.setExceptionAttribute("ex"); //default is exception
		//r.setWarnLogCategory("example.MvcLogger"); //no dafault
		return r;
	}
	
	
	
	
	
	
	
}
